Author Topic: V7 II transmission problem  (Read 325 times)

Offline lorengo70

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V7 II transmission problem
« on: April 15, 2021, 07:30:10 AM »
So, my V7 II (with50k miles on it) was giving me problems getting into neutral for the last couple of weeks. This was solved by just adjusting the clutch tension at the handlebar. Happen a few times and every time i would just adjust it and keep riding. Then yesterday, i went for a quick ride after work and when i sat on a red light in first gear with the clutch pulled, the bike started to move forward. Took the bike to the side walk, adjusted the clutch and started riding home as i could tell something was wrong. Three miles from home, i start losing power to the rear wheel. Park the bike to the side, try to adjust the lever and I could not get the bike to transmit power to the rear wheel no matter what gear I was in. I pushed the bike home (not fun pushing that bike uphill. Luigi got cursed a lot).  When i got home I disassembled the shaft drive just in case there was a problem in the final transmission (as i had suspected, that was not the problem). So, questions for you guys/gals, is this the previously and seemly common rod and throw out bearing or is this something more sinister (gear box problem?). As i mentioned, i can put the bike on any gear and push it without any resistance (just a slight clucking sound). Any ideas on what I am up against? Will be very grateful to hear your thoughts on this problem.
Thanks in advance.

Luciano.
2016 V7 II Stone (Black)
2015 Suzuki TU250

Offline Vagrant

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Re: V7 II transmission problem
« Reply #1 on: April 15, 2021, 07:45:56 AM »
sounds like you were one of the unlucky ones who got a stone without the crankshaft thrust washer. might as well haul it back to the dealer for a new engine.
search here for missing thrust washer.
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Offline lorengo70

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Re: V7 II transmission problem
« Reply #2 on: April 15, 2021, 08:01:47 AM »
Hi Vagrant, i thought the thrust washer issue would pop up in the first couple thousand miles (my bike has 50k). Also, the engine sounds fine (it revs well and no strange sounds). It just wont transmit the power to the rear wheel when i put it in gear.
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Re: V7 II transmission problem
« Reply #3 on: April 15, 2021, 08:05:34 AM »
I thought it sounded like the lever at the transmission end might need to be adjusted, or perhaps itís a worn cable. How many miles has the clutch cable been on the bike?
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Re: V7 II transmission problem
« Reply #3 on: April 15, 2021, 08:05:34 AM »

Online Kev m

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Re: V7 II transmission problem
« Reply #4 on: April 15, 2021, 08:10:22 AM »
OK, so again, it's not a MISSING thrust washer, it's that the crankshaft was ground too small/out of spec on a batch and that allows the thrust washer to come out of position and the crank migrates back. It would be shocking to hear that a motor made it to 50k miles with that regardless.

Anyway, I hope it is something else.

Is the clutch cable original? Any chance it has stretched or is otherwise damaged? (Didn't become dislodged from the hook and seated against the head did it?).

IF it's not the cable I would worry about the clutch next.

But at that point you might want to get your hands on the dealer TSB for the bad cranks just to see how they measure and determine that the crankshaft has started to move back in the block. Probably not it, I sure hope, but still.
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Offline lorengo70

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Re: V7 II transmission problem
« Reply #5 on: April 15, 2021, 08:11:43 AM »
Dirk, the clutch cable has less than 10k miles (its my third one now). If the clutch cable was loose (broken), then the clutch would be engaging and I would not be able to freely shift gears (as i can now). I feels like the clutch is fully disengaged as i can put it into gear and push the bike no problems. cheers.
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Online Kev m

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Re: V7 II transmission problem
« Reply #6 on: April 15, 2021, 08:18:33 AM »
Dirk, the clutch cable has less than 10k miles (its my third one now). If the clutch cable was loose (broken), then the clutch would be engaging and I would not be able to freely shift gears (as i can now). I feels like the clutch is fully disengaged as i can put it into gear and push the bike no problems. cheers.

Ahhh so it's locked released and not engaged.

Yeah, that does sound like a clutch failure.
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Offline lorengo70

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Re: V7 II transmission problem
« Reply #7 on: April 15, 2021, 08:27:35 AM »
Hi Kev, yes, sounds like clutch failure but i thought clutches gave you plenty of warning before not engaging at all (i.e. clutch slipping, etc). No such symptoms were noticed before it hit this situation.
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Offline John A

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Re: V7 II transmission problem
« Reply #8 on: April 15, 2021, 08:04:31 PM »
It sounds like a clutch problem.  As a side note, for any small block that has a timing hole on the right hand side of the transmission you can easily check check for a crankshaft thrust problem by removing the plug. Looking in the hole you will see the flywheel. Pull the clutch lever and you will see the flywheel move forward a small amount. You can use a screwdriver and pry the flywheel aft. By alternating pulling  the lever and prying aft you can visually see the amount of crankshaft thrust. Any more than a millimeter or so means itís time for an engine out disassembley.
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Offline SmithSwede

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Re: V7 II transmission problem
« Reply #9 on: April 16, 2021, 12:05:01 AM »
Iím wondering why you are on the third clutch cable after only 50K miles.
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Re: V7 II transmission problem
« Reply #10 on: April 16, 2021, 12:23:16 AM »
It sounds like a clutch problem.  As a side note, for any small block that has a timing hole on the right hand side of the transmission you can easily check check for a crankshaft thrust problem by removing the plug. Looking in the hole you will see the flywheel. Pull the clutch lever and you will see the flywheel move forward a small amount. You can use a screwdriver and pry the flywheel aft. By alternating pulling  the lever and prying aft you can visually see the amount of crankshaft thrust. Any more than a millimeter or so means itís time for an engine out disassembley.
No timing hole on the Mk2 . I would pull the starter off and check flywheel axial movement from there as above and maybe any other clutch issues .
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Offline lorengo70

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Re: V7 II transmission problem
« Reply #11 on: April 16, 2021, 08:22:09 AM »
Iím wondering why you are on the third clutch cable after only 50K miles.

SS, original clutch hand lever was a bit shady in that it had some plastic washer that were used to jimmy the lever in place (not sure what they were doing with that. maybe it was not the correct lever for it?). Anyhow, it made the cable rub against the housing and it ate into the cable in the first 10k km. . I put aft mkt short levers after that. The second cable started to lose a few strands and, given my previous experience with the first cable (left me on the side of the highway on a bumper to bumper traffic hot summer day having to macgiver a quick solution to get me back home), i decided to put a third cable for peace of mind and it looks fine so far. I admit that i have not lubed it since and that that is most likely also a contribution factor to premature wear of these cables.
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Offline lorengo70

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Re: V7 II transmission problem
« Reply #12 on: April 16, 2021, 08:29:29 AM »
It sounds like a clutch problem.  As a side note, for any small block that has a timing hole on the right hand side of the transmission you can easily check check for a crankshaft thrust problem by removing the plug. Looking in the hole you will see the flywheel. Pull the clutch lever and you will see the flywheel move forward a small amount. You can use a screwdriver and pry the flywheel aft. By alternating pulling  the lever and prying aft you can visually see the amount of crankshaft thrust. Any more than a millimeter or so means itís time for an engine out disassembley.

John, coming to the conclusion that it is a worn clutch problem. From reading here on the forum from those guys that have high mileage V7s (Malik, SmithSwede), my bike is getting to the milage (50k miles) where clutches start to get to the end of their lives. I will have my bike towed to the dealership here in Toronto tomorrow for them to have a look and I will report back. Ideally, I would like to get this job done myself but looks like you need to hoist the bike to remove gear box. Unfortunately, i dont have the space/equipment to do that so i will miss out on getting to know my bike more intimately and will have to live vicariously by reading about other people's experiences (SmithSwede has a few posts on changing his clutch. He is on his second one by now).

Thanks to all of you for providing your thoughts/feedback.

Cheers.
2016 V7 II Stone (Black)
2015 Suzuki TU250

Offline SmithSwede

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Re: V7 II transmission problem
« Reply #13 on: April 16, 2021, 01:11:55 PM »
I can confirm that the clutch job requires about a full weekend of work.  You need to securely lift the bike and take the back end off.  So if you have limited space, thatís probably a no go. 

Iím now at 119,000 miles and original clutch cable is fine.  The key is to regularly lubricate the barrel fitting on both ends so they can rotate in the lever.   Otherwise you are forcing the cable itself to twist and it gets work hardened and strands will brake.   Iíd give it a good shot of grease at least each oil change. 

Please do report back on this.  Post some pictures of the relevant parts if you can.  iím curious about what went wrong.
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